Originally Posted by
Tearor
I have another one.
Three, let's say dwarves, live in a land behind the mountain. Thus far away from civilisation.
They decide they need a football, so they send one of them to the town far far away to buy one. They don't know how much it is, so they each give him $10, for a total of $30.
When the chosen one finally gets to the town, he finds the football to cost $25. He buys it and starts his way back. On this way, he thinks about what to do with the $5 he got back, and decides to give everyone (incl himself) $1 refund and keep the remaining $2 as payment for his long way.
SOOO, now every one of the three has effectively paid $9. 3x$9=$27. He kept $2. 27+2=$29. Where is the missing $1?